Filling The Solar Circuit - Viessmann FB2B Installation And Service Instructions Manual

Commissioning, inspection, maintenance
Further details regarding the individual steps

Filling the solar circuit

Solar thermal system installation and service instructions
A Solar circuit fill valve
!
Please note
Overheated collector areas and
overheated heat transfer medium
can cause burns/scalding and
equipment damage.
When working on the collector
and the solar circuit, protect the
collector area against solar irra-
diation.
1. Thoroughly flush the on-site pipe-
work.
30
(cont.)
2. Fill the solar circuit via fill valve A
with "Tyfocor LS".
Minimum system pressure: 1.7 bar.
Permiss. operating pressure: 6 bar.
!
Please note
To prevent equipment dam-
age, use only "Tyfocor LS".
Never fill with water.
3. Close ball valve of fill valve A.
4. Open the air vent valve at the solar
collector.
5. Start solar circuit pump via a relay
test (see page 101).
6. Let the solar circuit pump run until the
solar circuit is fully vented. At a sys-
tem pressure below 1.7 bar top up
with "Tyfocor LS".
7. Close the air vent valve at the solar
collector.
8. Check system pressure. Below
1.7 bar top up with "Tyfocor LS".